<template>
  <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model.trim="title" @keyup.enter="addTodo"/>
      </div>
</template>

<script>
export default {
    name:'Header',
    data(){
      return{
        title:''
      }
    },
    methods: {
      addTodo(){
        if(this.title===''){
          alert('请输入内容')
          return
        }

        this.$bus.$emit('addTodo',this.title)

        this.title=''

      }
    }
}
</script>

<style scoped>
/*header*/
.todo-header input {
  width: 560px;
  height: 28px;
  font-size: 14px;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 7px;
}

.todo-header input:focus {
  outline: none;
  border-color: rgba(82, 168, 236, 0.8);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
</style>